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Thermal data and power dissipation of MSP430

Pavithra Gokhale
Prodigy 30 points

Hi,

We are in need of thermal parameters for MSP430G2353IPW28 to calculate the device's power dissipation. We need the following parameters:

1. Thermal resistance 

2. Junction temperature

Please help. 

Thanks,

Pavithra Gokhale.

  • 0
    Guru 58965 points

    According to the data-sheet. “Over recommended ranges of supply voltage and operating free-air temperature", the maximum current at each GPIO pin should not exceed ±6 mA, and maximum total current for all GPIO combined should not exceed ±48 mA.

    Thus the total power dissipation is really very small.

  • 0
    Expert 2740 points

    Pavithra Gokhale said:
    2. Junction temperature

    This parameter is software programmable.  

    Peter

  • 0 in reply to Peter Dvorak
    Guru 227245 points

    Peter Dvorak said:
    This parameter is software programmable.  

    :)
    Yes, since the actual usage defines the momentary power dissipation, it also sets the junction temperature. Which can be measured using the internal temperature sensor.
    However, I guess the OP meant the maximum junction temperature.

    However, this (and the maximum power dissipation) is not mentioned anywhere. Only the maximum storage temperature (150°C). In first succession, I’d say the maximum junction temperature during operation is below. 125°C is a typical value. Besides this, the 85°C maximum operating free-air temperature is a good value for meeting the specs. (above, the MSP probably won’t fail but leave the specs regarding precision, current consumption etc.)

    The thermal resistance is given in the separate document about the package.

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